Revenue from Contracts with Customers - Contract Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contract Assets [Roll Forward]
Beginning Balance - Contract Assets	$ 144	$ 174
Amounts reclassified to receivables, contract assets	(59)	(86)
Revenues recognized, contract assets	52	68
Contract with Customer, Asset, Increase (Decrease) for Contract Acquired in Business Combination	12	(12)
Ending Balance - Contract Assets	$ 149	$ 144